What to do before TTC?

Brittany • 27. Finally got my BFP after 11 cycles of TTC by using the SMEP, Preseed, and a whole lot of prayers!!
My husband and I got married recently. I am on the pill but know sometimes that can fail. We aren't TTC but know if we happen to get pregnant we will be thrilled. My question is, what are some things that I can be doing now to make sure I am healthy when we do decide to go off the pill? Any vitamins I should be taking now? Also, finances, what can we do to make sure we are financially prepared? Any tid bits you can offer are greatly appreciated.